采用无线机车信号实现机车信号主体化的研究

Research on Realizing Cab-Signaling Authorization by Using Radio Based CabSignaling

分析了影响现有机车信号主体化的主要原因,包括轨道电路传输信息存在邻线干扰、牵引回流干扰、同频干扰、半边侵入等多种影响;站内轨道电路电码化常出现发码时间滞后、码型奇变、侧线岔区无信号、移频轨道电路与交流计数轨道电路结合部易出现掉码等现象。为此,提出采用无线方式实现我国机车信号主体化。采用无线信道传输信息具有数字信号传输可靠性高,误码率低,信号稳定;车-地之间双向传输,信息闭环确认;列车无论在任何区段上机车信号连续显示等优点。本文针对自动闭塞和半自动闭塞行车方式提出了无线机车信号主体化的两种方案,阐述了方案的基本结构,并对方案的先进性、可行性及系统的可靠性和安全性进行了分析。

The major reasons influencing cab-signaling authorization are analyzed in this paper. The adjacent track interference, traction return current interference, same frequency interference and half incursion exist in track circuit information transmission. Code-sending time lags, pattern variations, absence of signals on side tracks or in switch sections and loss of codes in the connecting part between the frequency-shift modulated track circuit and AC counting track circuit often occur. Therefore, the radio-based mode is adopted for implementation of cab-signaling authorization. The radio channel transmission has a lot of advantages. Digital signal transmission guarantees high reliability, low bit error rates and signal stability. Two way transmission between the train and ground facilitates closed-loop acknowledgement. Continuous display of cab signals are put on wherever the train goes. Two radio cab-signaling authorization alternatives are put forward with regard to automatic blocking and semi-automatic blocking. The basic structure, advantages and feasibility of the alternatives and the reliability and safety of the system are analyzed.